[Coco] Fixing my "F" board TDP-100...

[Al Hartman]

That looks right! Ok, now to see if I have any in my parts box. I may have a 
different formfactor, but the same value.

-[ Al ]-

-----Original Message----- 
From: Zippster

I have a CoCo1 that I believe is an F board.  It has the mylar keyboard 
cable and the jumpers
for 16 or 64k.

Pic here —> 
<https://drive.google.com/file/d/0B1sgl615FlGndzNSODJLbExreXc/view?usp=sharing 
<https://drive.google.com/file/d/0B1sgl615FlGndzNSODJLbExreXc/view?usp=sharing>>

If that’s the same board, it’s connected to VCC and VSS on the 6847.  It’s a 
decoupling cap.
Use .1uF

- Ed


> On Mar 7, 2015, at 1:43 PM, Al Hartman <alhartman6 at optonline.net> wrote:
>
> Took another swing at it this morning:
>
> 1. One of the connections from the MDP UVD was soldered to one end of C22. 
> The clip and wire had obviously broken off the board. Whoever did it, put 
> a lot of solder on the leg. In trying to desolder it, the capacitor 
> disintegrated. I need to know what value to put there. The only schematics 
> I have are for earlier boards, and the part numbers are different.
>
> Does anyone know what value this capacitor should be? C22 is connected to 
> the 5v line. Is there an "F" board schematic or parts list out there?
>
> 2. The HJL Keyboard was made by Oak Switch Systems. I'm now looking to see 
> if I can find a replacement key plunger for it, as it is impossible to 
> desolder and resolder a keystation. The key stations are plastic welded to 
> the metal bottom. But, they keytop comes apart, and the plunger can be 
> replaced.
>
> It's the same kind of keyboard as used in the Osbourne Computer: 
> http://deskthority.net/photos-f62/osborne-1-oak-switch-systems-full-travel-membrane-keyboard-t7855.html
>
> I have to try to find a plunger and replacement "9" keycap.
>
> -[ Al ]-